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A kind of quick-setting agent suitable for shotcrete and preparation method thereof
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A technology of sprayed concrete and quick-setting agent, which is applied in the field of concrete construction, can solve the problems of low strength and high rebound rate, achieve the effect of high compressive strength, small rebound rate, and increase the initial setting time
Active Publication Date: 2021-02-19
THE FOURTH ENG CO LTD OF CCCC FIRST HIGHWAY ENG +2
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[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a quick-setting agent suitable for shotcrete and a preparation method thereof, which solves the problem that the shotcrete used for tunnel construction in the prior art has a high rebound rate when it is used, and The problem of low strength after molding
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Embodiment 1
[0029] This embodiment provides a kind of quick-setting agent suitable for sprayed concrete, including component A and component B, the material composition in component A: CaO·Al 2 o 3 2kg, 4CaO·Al 2 o 3 · Fe 2 o 3 5kg, CaO·SiO 2 4kg, Al 2 o 3 5kg, Na 3 C 6 h 5 o 7 2H 2 O is 1kg, PDMS is 5kg, SPEOT is 3kg, TEOA is 3kg, H 2 O is 50kg;
[0030] The material composition in the component B: NaOH is 22kg, Al(OH) 3 28kg, C 6 h 8 o 7 ·H 2 O is 2kg, Na 2 O·10SiO 2 3kg, H 2 O is 46kg.
[0031] The weight ratio between component A and component B is 2:1.
Embodiment 2
[0033] This embodiment provides a kind of quick-setting agent suitable for sprayed concrete, including component A and component B, the material composition in component A: CaO·Al 2 o 3 3kg, 4CaO·Al 2 o 3 · Fe 2 o 3 5kg, CaO·SiO 2 3kg, Al 2 o 3 3kg, Na 3 C 6 h5 o 7 2H 2 O is 0.5kg, PDMS is 7kg, SPEOT is 2kg, TEOA is 2kg, H 2 O is 45kg;
[0034] The material composition in the component B: NaOH is 20kg, Al(OH) 3 31kg, C 6 h 8 o 7 ·H 2 O is 1kg, Na 2 O·10SiO 2 4kg, H 2 O is 40kg.
[0035] The weight ratio between component A and component B is 1:1.
Embodiment 3
[0037] This embodiment provides a kind of quick-setting agent suitable for sprayed concrete, including component A and component B, the material composition in component A: CaO·Al 2 o 3 2kg, 4CaO·Al 2 o 3 · Fe 2 o 3 6kg, CaO·SiO 2 5kg, Al 2 o 3 7kg, Na 3 C 6 h 5 o 7 2H 2 O is 1.2kg, PDMS is 6kg, SPEOT is 2kg, TEOA is 4kg, H 2 O is 60kg;
[0038] The material composition in the component B: NaOH is 23kg, Al(OH) 3 35kg, C 6 h 8 o 7 ·H 2 O is 3kg, Na 2 O·10SiO 2 2kg, H 2 O is 50kg.
[0039] The weight ratio between component A and component B is 2:3.
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Abstract
The invention discloses a quick-setting agent suitable for shotcrete and a preparation method thereof, comprising component A and component B, the material composition in component A: 2-4 parts of CaO·AI2O3, 4 parts of CaO·AI 2 O 3 ·Fe 2 O 3 4‑6 parts for CaO·SiO2, 3‑5 parts for AI 2 O 3 is 3-7 parts, Na 3 C 6 H 5 O 7 ·2H 2 O is 0.5‑1.5 parts, PDMS is 4‑7 parts, SPEOT is 2‑3 parts, TEOA is 2‑4 parts, H 2 O is 40-60 parts; the material composition in the component B: NaOH is 20-23 parts, AI(OH) 3 for 25‑35 parts, C 6 H 8 O 7 ·H 2 O is 1‑3 parts, R 2 O·nSiO 2 for 2‑5 parts, H 2 O is 40-50 parts; wherein, the mixed mass ratio of component A and component B is 2:1-3; the detection data parameters of the quick-setting agent are as follows: rebound rate≤5%. The mixed use of component A and component B in the quick-setting agent provided by the present invention can save 20-30% from the economic cost, and achieve the advantage of making the rebound rate of shotcrete less than 5%, and accelerate the concrete The rapid setting time greatly improves the construction progress.
Description
technical field [0001] The invention belongs to the technical field of concrete construction, and in particular relates to an accelerator suitable for shotcrete and a preparation method thereof. Background technique [0002] With the rapid construction of infrastructure in our country this year, tunnel construction, as a kind of building construction, is more difficult than other construction methods. In the history of the development of tunnel construction technology, the "New Austrian Method" construction method invented by the Austrian scholar Rabsiewicz in the 1950s was generally adopted at home and abroad. This method uses anchor rods and shotcrete to support the surrounding rock. The injection layer and the surrounding rock are closely combined to form a support system. After more than 60 years, most tunnels around the world still use this method for construction. The sprayed concrete used in this shield tunneling construction method has developed from dry operation t...
Claims
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Application Information
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